The chromatin-remodelling factor PICKLE interacts with CONSTANS to promote flowering in Arabidopsis
作 者：Jing YJ*, Guo Q, Zha P, Lin RC*
影响因子:5.624
刊物名称:Plant Cell and Environment
出版年份:2019
卷:42期:8 页码:2495-2507
文章摘要:In many flowering plants, successful reproductive development depends on the plant's ability to sense seasonal photoperiodic changes and adjust its vegetative growth accordingly. InArabidopsis thaliana, the day‐length‐dependent accumulation of CONSTANS (CO) is crucial for the rhythmic activation ofFLOWERING LOCUS T(FT) expression at dusk under long days. However, the regulation of photoperiod‐dependent changes of the diurnalFTexpression pattern at the chromatin level is largely unknown. In this study, we show that the ATPase‐dependent chromatin‐remodelling factor PICKLE (PKL) acts through the CO‐FT regulatory module and contributes toFTactivation in leaf vasculature. PKL physically interacts with CO, and this interaction facilitates their binding to the common regions ofFTchromatin in response to photoperiod. Long‐day signal triggers theFTchromatin switch between the active state at dusk and the inactive state at night, and PKL is responsible for the diurnal state switch. Thus, our study reveals that PKL activatesFTtranscription likely through facilitating access of CO toFTchromatin at dusk to synchronize flowering time in response to environmental cues.